chalice[cdk] confusing execution

I've followed the [tutorial](https://aws.github.io/chalice/tutorials/cdk.html) and it seems fine, but everything beyond it becomes unknown territory. For example, for the _stage_config_ parameter at _Chalice CDK constructor_, I'd like to create **multiple stages** as in chalice's _config.json_, but I've tried and haven't found any sort of solution. The tutorial says that cdk's stage_config argument is **merged** with chalice's config.json, but it seems that none of the config.json's values are taken into consideration when **CDK deploy**, only the _stage_config argument_.

chalice[cdk] version == 1.26.2

Start with the Chalice CDK constructor's stage_config handling and the tutorial's CDK example, then compare those inputs with config.json during CDK deploy. Done means documenting or correcting how config.json values are merged and establishing how multiple stages should be represented.

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